Radio Design Labs ST-HP3
High Pass Filter - 300 Hz & 500 Hz

OUR PART #  STHP3


Radio Design Labs' ST-HP3 is the ideal choice where line-level audio filtering needs to be provided at the input of a power amplifier for protection of public address horns against damage from low frequencies.

The ST-HP3 has one input and two filtered outputs: 300 Hz high pass and 500 Hz high pass. Both the input and output are balanced, and each may be wired unbalanced if required. The input accepts line-level (+4 dBu nominal) audio. The module operates at unity gain (balanced input and output). The two outputs may be used simultaneously.

The ST-HP3 features RDL's SupplyFlex power input configuration for operation directly from ground-referenced, floating or bipolar 24 Vdc power.

NOTE: Radio Design Labs' PS-24AS power supply is NOT included but is required in order to power this product.  Please see the "Accessories" tab or click here for more information on the PS-24AS power supply.

Features:

  • Horn Loudspeaker Protection
  • Low-Frequency Attenuation below 300 Hz
  • Low-Frequency Attenuation below 500 Hz
  • Line-Level Input and Outputs
  • Filtering Requiring no Field Adjustment
  • RDL® SupplyFlex™ Power Input Configuration

Typical Performance:

  • Input: 20 kO balanced line level (+4 dBu)
  • Outputs (2): 150 O balanced line level (+4 dBu)
  • Headroom: > 18 dB
  • THD+N: < 0.01%
  • Residual Noise: < 90 dB (referred to +4 dBu)
  • Insertion Loss: < 2 dB
  • 300 Hz Output:
    Frequency Response: 300 Hz to 30 kHz (+/- 0.5 dB)
    -3 dB Frequency: 225 Hz
  • 500 Hz Output:
    Frequency Response: 500 Hz to 30 kHz (+/- 1.0dB)
    -3 dB Frequency: 450 Hz
  • Power Requirement: GROUND-REFERENCED or FLOATING, 24 to 33 Vdc @ 30 mA
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